Minor bug fixes from BSD Net2 gdb:

* blockframe.c (get_prev_frame_info):  If FRAME_CHAIN_COMBINE
returns 0, there is no previous frame.
* breakpoint.c (commands_command):  If !from_tty, don't call
input_from_terminal_p().
* dbxread.c (record_misc_function):  Speed up slightly.
(compare_psymbols):  Ditto.
* infcmd.c (do_registers_info):  Take a second argument to
determine whether to print float registers.  "info registers"
does not do so anymore.  "info all-registers" does, now.
* mips-tdep.c, pyr-tdep.c (xxx_do_registers_info):  Take second
arg and ignore it.
* tm-mips.h, tm-pyr.h (DO_REGISTERS_INFO):  Pass second arg.
* inflow.c (initialize_inflow):  Set tflags_ours correctly.

gdb/pyr-tdep.c

@@ -46,10 +46,12 @@ pyr_print_registers(reg_buf, regnum)
 		   "usp", usp);
 }
 
-/* Print the register regnum, or all registers if regnum is -1. */
+/* Print the register regnum, or all registers if regnum is -1.
+   fpregs is currently ignored.  */
 
-pyr_do_registers_info (regnum)
+pyr_do_registers_info (regnum, fpregs)
     int regnum;
+    int fpregs;
 {
   /* On a pyr, we know a virtual register can always fit in an long.
      Here (and elsewhere) we take advantage of that.  Yuk.  */